12G 



nerves and nervules, those of the inner half always being yellowish-white. 

 Posterior femora with two black spots inside ; inferior channel black, or 

 marked with two large, black spots ; posterior tibiae pwhahly bluish. 



Dimensions. — 2 Length, 1.05 inches; elytra, 1.12 inches; posterior 

 femora, 0.54 inch ; posterior tibiae, 0.47 inch. $ About same size and pro- 

 portions. 



Eastern AVyoming, Colorado, Nevada (Thomas); Colorado (Dodge). 



<E. carliHg:iaiia, Thos., Proc. Acad. Nat. Sci. Phila., 1870, 81. — Hayden's 



Geol. Surv. Terr., 1870, 275. 



Vertex broad ; central foveola shallow, about as broad as long, somewhat 

 hexagonal, a median carina divides it into two parts ; lateral foveolse very shal- 

 low ; at tlie top of the frontal costa a lunate depression ; frontal costa sulcate 

 below the ocellus, contracted in the middle, expanded and obliterated near 

 the clypeus ; lateral carinas reaching the corners of the face. Antennae 

 slender, somewhat flattened. Posterior lobe of the pronotum broad, disk 

 flat; median carina simply a raised line; lateral carinse distinct on the ante- 

 rior lobe and anterior portion of the posterior lobe ; posterior lobe densely 

 but minutely punctured ; apical angle about a right angle. Elytra and wings 

 extend slightly beyond the abdomen. Posterior femora not reaching the 

 extremity of the abdomen. 



Color (dried after immersion). — Ash-colored. Head and thorax uniform, 

 varying from an ashy-yellow to an ashy-brown. Elytra darkest near the 

 base; transparent at the apex, sometimes without spots, and sometimes with 

 two irregular, pale, fuscous bands, and a few fuscous spots near the apex. 

 Wings with the inner half fuliginous, the strong, radiating nerves extending 

 as dark lines to the margin; apical half (except the dark. nerves) transparent; 

 sometimes the interspaces of the inner half and only the nerves and nervules 

 fuliginous ; the nervules of the disk are very regularly parallel, but curved 

 slightly outward. Lower channel of the posterior femora and two spots 

 inside black. Wlien living the color differs but little from this description; 

 sometimes a purplish tint pervades the whole insect. 



Dimensions. — 9 Length, 1.4 inches ; elytra, 1.3 inches ; posterior femora, 

 0.63 inch; posterior tibiae, 55 inch, s Length, 1.15 to L2 inches. 



Colorado, Wyoming, Montana (Thomas). 



